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Contact Jin Zhanrui Dongguan Kingrui Precision Mold Co.
 
24-hour hotline: 400-0769-391
 
Phone: 0769-82663318
 
E-mail: kingruizhao@kingmold.com
 
Address: Building A No.9 Xinxing Road, Shatou Southern District, Chang'an Town, Dongguan, China

The basic design principle of the mold

Article source: Published time:2016-03-30 14:30:21
1, the size of the batch experiment, mold production hours, wood or resin can be manufactured. However, if the mold is to obtain experimental data about the product shrinkage, dimensional stability and cycle time, etc., you should use a single cavity mold to experiment, and can ensure its use under production conditions. General mold with plaster, copper, aluminum or aluminum - alloy steel, aluminum is rarely used - Resin.
 
2, geometric design, design, often considering the dimensional stability and surface quality. For example, product design and dimensional stability requires die (die), but require a higher surface gloss products, but requires the use of the male mold (punch), this way, the plastic parts ordering party will consider the two point, so that products can be produced under the best conditions. Experience shows that the design does not meet the actual processing conditions often fail.
 
3, dimensionally stable, during the molding process, contact with the mold surfaces and better dimensional stability than the plastic mold part to leave. If in the future due to the rigidity of the material needs to change the material thickness requirements may lead to male convert to the female mold. Dimensional tolerances for plastic parts can not be less than 10% shrinkage.
 
4, plastic surface, in relation to the molding material can encase the range of the surface structure of the plastic parts can be met at the contact with the mold in the molding. If possible, do not light cleansing of plastic parts in contact with the mold surface. Like the use of a female mold manufacturing and laundry tub basin situation.
 
5, modified, if the level of mechanical saws to amputate plastic clamping edge in the height direction, at least 6 ~ 8mm margin. Other finishing work, such as grinding, cutting or laser jet, it must be left margin. The gap between the knife-edge die cutting lines minimum distribution width punching die when trimming is small, these are to be noted.
 
6, shrinkage and deformation, easy to shrink plastics (such as PE), some plastic deformation, anyway prevention, plastic deformation will occur during the cooling phase. Under such conditions, it is necessary to change the mold to fit the shape of the geometric deviation of plastic parts. For example: Although the plastic walls to keep straight, but it has deviated from the reference center 10mm; can raise the mold base to adjust this amount of shrinkage deformation.
 
7, shrinkage, in the manufacture of plastic mold must take into account the following factors contraction. ① molding shrinkage. If it is not clear that plastic shrinkage, it must be sampled or similar shaped mold to obtain experimentally. Note: This method can only be obtained by shrinkage, deformation dimensions can not be obtained. ② adverse effects of shrinkage caused by the intermediate medium, such as ceramic, silicone rubber. ③ mold shrinkage of the material used, such as when a shrinkage of cast aluminum.
Vacuum forming mold design including batch size, molding equipment, precision conditions, geometric design, dimensional stability and surface quality content.
Precision machining, precision wire cutting, coordinate jig grinders
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